Reversing mechanism



July 22, 1924. 1,502,150

G. C. MARTIN REVERSING MECHANISM July 22, 1924. 1,502,150

G. c. MARTIN REVERSING MEGHANISM Original iled July 314 1920 v2 Sheets-Shrew 2 E592 /o/ V07 VPatented July 22, 1924:.,

UNE'EED STYS isoalso GEORGE CUSHING MARTIN, F LOS ANGELES, CALIFORNIA.

REVERSING MECHANISM.

Original application filed July 31, 1920, Serial No. 400,525. :Dividedl and this application filed Apriivl,

1922. Serial No. 555,482. 1

To' all whom t may concern Be it known that I, GEORGE CUsHrNG MARTIN, a citizen of the United States, residing at Los Angeles, in the county of Los 5 Angeles and State of California, have invented a new and useful Reversing Mechanism, of which the following is a yspecification.

This invention relates to means adapted for operating centre heads and troweling devices in concrete pipe machines and for other purposes in which it is desired to give a shaftboth rotary and endwise movement at the same time and to reverse the endwise movement of suchV shaft.

This application is a division of my application Serial No. 113,360, filed August 5, 1916, for concrete pipe machine. Renewed July 31, 1920, Serial No. 400,525.

An object of this invention is to provide effective automatic means for operating a shaftin the manner stated. K

Other objects are simplicity, certainty of action, and ease of control. Features of invention reside in the various parts and combinations of parts as will more fully herev inafter appear.

. Other objects, advantages and features of invention may appear from the accompanying drawings-the subjoined detail description and the appended claims. e

The accompanying drawings illustrate the invention.

Figure 1 is an elevation of a reversing mechanism constructed in accordance Awith this invention and arranged for use in a concrete pipe machine of which it constitutes a part. The clutch is shown at neutral position.

Fig. 2 is an, enlarged broken and partly sectioned elevation of some of the parts going to make up this invention, showing the same shifted to reverse position for lowering the travellingshaft. y

Fig. 3 is a broken view'partly in vertical section showing the clutch engaged forthe troweling operation.

Fig. 4 is a'view partially in section of one of the friction devices or clutch mechanisms 50 employed in controllingthe reciprocation of the wrttalv Shaft Sheva Fig. l-y

Reference is made to my application for` clutch, Serial No. 552,387. Filed April 13,

1922, as a further division of the parent application.

Referring to Fig. 1, I have shown a frame 10 formed preferably of angle Vironor like bars and having a base 11. The upper end of the frame 10 has a standard or casting 13 rising centrally therefrom and provided with brackets carrying bearings 14 and 15 within which operates thel shaft 16 to the lower end of which is shown attached, the pipe shaping device 17.

is a bevelled gear secured upon the shaftV 16 and meshing with another bevelled gear 61 carried upon the end of` a vpower shaft 62. The gear 60 is mounted on the bearing 14 and is connected with shaft 16 by means of a spline or feather-as at 63 which `engages a groove 64 of said shaft so that said shaft may be moved endwise without-interfering with its rotation by operation of the gear 60. 1

The power shaft 62 is journalled in suitable bearings on standard 13, and projects beyond rsaid standard, is journalled in a bearing 65 carried by a bracket 66 supported by said standard, and is provided with a loose pulley 67 between said standard and the bearing 65.

The pulley 67 loose on power shaft 62, is adapted to be connected `with said shaft by suitable clutch mechanism 68 so as to be revolved thereby. Said clutch mechanism is arranged to be movedinto and outl of puly le enoiaofino` ositiou b means of a lever 69 f 2D b D which is: pivotally supported on the bracketI 66'and which has a thrust rod 70 pivoted to yits lower end and operating through guides 71upon the frame 10 for the purpose of moving the clutch mechanism 68 into and out of position for connecting the pulley 67 yvvitlrthe shaft 62 to drive said shaft. Said thrust rodris provided with a handle 72 by which it may beoperated. y l.The pulley 67 is adapted to receive power from anypdesired source for operating the machine. 7 v.7 3 indicates pulley/.67. y. 4 4

Wherever the parte above' enumerated,

a powervbelt for'driving the are shown in the other views they are indicated by characters corresponding to those ap lied in Fig. 1.

n the application of the invention as shown, thesliaft 16 is vertical, and lreciprocation of the same is up and down, and the parts are shown as being so arranged that the movement will be slower and itsv power for rotation will be greater on the upward than on the downward movement; but various combinations of gears may had vvforsuch Arelative speeds as may be 'desired or deemed advisable. 76 is a hollow feed screw fitted upon the shaft member 16 which is adapted'for rotary and enwise 'movement The 'feed screw 7 6V is mounted Afor Vendwise movement andV Vis adapted to move shaft longitudinallyVA` relative to Vtheframe ,and to permit said shaft to` lloe rotated. The shaft is provided 4above and v,below ,this hollow 'feed` screw with collars or/stops 77pan'd 78 finedV to the shaft yat greater distances apart than the length Vof said feed screw to permit the shaftto move longitudinally relative to said screw. The lower Ycollar 78 is adapted to be Stopped by and to rest upon the bevel gear at the lowest position of rshaft 16 andA during the ascent of the feed screw across the open'lost motion space caused by the dif Vference Vlo'etw'eeiivthelength ofithe feed screw Vandthe spacebetween the collars 77 yand 7 8. The' feed screw is'supported and reciprocated vertically byfan internally threaded spur gear 80 carried and supported against end'thrust'or endwise movement by the up per bearing 15 and driven by agearl 81 which is driven by shaft 82. A guide piecev 83 is fixed to the feed screw 76 bya set screw Se'and'iembraces and slides along the shaft 82, and serves to hold the feed screw against rotationl so that the rotationA of the internally threaded gear 80 will move the hollow screw` up or down according tol the direction in which the shaft 82`is revolved by Jthe bevel gears 85, 8G driven byA shaft 87 which is arranged'counter to the power shaft 62 and is vmounted in cl'nearing in Ythe,Ystandsrd 13 and' is adapted to be Valternately rotatedin one and the ot-herrdi` rection by reversetrains ofgearswhich 'con total distance between the trip blocks 98 and 97 so upper spring 98 is only active"during` the latter Vportion of thefdown- `ward movement of the trip rod 94:, and

spring 99 is only active during the latter part of the upward. `movement volf said rod. A t the-final upward movementof said/trip rod the springl '99" willv force/'the rend of Vlever i940 rupjfand Avicer versa, Vonthe downward ginovenfientv the spring 9'8" will force the" end of the lever 9'Odown. p

The trip rod 94ii`s provided'with'collars 1007 101 operable by the guide piece 8'3 to raiseand lowerthe trip rod attheupper and lower limits `of movementof the feed screw 7 6. y i

ln order to maintain the clutch .in proper clutch operating positionfor effecting a trowling or 'reverse movement as Athe case may be, the forward free endof the lever carries `a double,latchmechanism made up of a yoke 102 which Yis Vsecured toY the lever 90 and projects va sufficient Vdistance above and belowithe samejto pivotally carry latches 103 and 104: that areadapted to eni'ages keepers 105 and V106 alternately for ho ding said lever in its eXtreme positions. The latches are normally pressed toward the `keepers bv springs 107 and 108 which bear against the outer end ofthe said lever 90and extend to heel portions formedfupon the latches, The trip blocks 96 and 97 have adjustable bolts 109 and 110 projecting inwardly therefrom and adaptedeto alternately strike the heels of the saidlatches, whereby they will be moved against their springs for disconnecting the latches from the keepers. The structure is suoli that when the'trip rod r94.- is moved"downwardly by the feed screw 7 8, the upper latchwillbe struck bythe bolt 109 and 'released froin'its keeper, permitting the lever 90't`o drop. "The spring 98 will have been compressed before therelease ofthe lat-oh against their, sleeve 93' so thatfwiienthe latch 103,l is'r'ais'edy'the spring 98 will throw the lever 90 downwardly Ywith a positivev action. rlhe lower latch 104 will then engage the keeper 106'an'd holdthesaid lever downwardly. VAs the rtrip rodl 94 is carried upwardly by the feed screw? the spring 99' will come in'icoiitact with kthe said sleeve 93 and as soon as the lower latch isreleased by the bolt 11Ok said spring willithrow the, lever upwardly again. Thisfmovement of the levjei1490 will rbe /c'ommnnicatedfto"a double conical wedge'devieeorlinenibr 111.,

which extends 'into the adjacent clutch devices 88 and 89. y The lower endof-the said ylever-QOis slotted and engages a pin 112car- -ried by a sleeve'113 which is loosely mounted in a groove 114 in the centraltfpart of 'said conicalv we'dge'device, so that the'lever is adapted to move said wedge backland forth to operate the friction clutch mechanism.

I claim:

1. In combination with a shaft journaled in bearings; said shaft being adapted for rotary and endwise movement in said bearings; means operated at each end of the path of movement of said shaft for reversing the direction of said shaft; said means comprising a rod, a sleeve slidable Yon said rod; a lever attachedby one arm to the sleeve; a drive shaft; a countershaft; driving connections between the drive shaft and countershaft; said driving connections being adapted to be alternately brought into action to drive the countershaft in opposite directions; means for bringing the driving connections alternately into action comprising clutch devices associated respectively with each of the drive connections, and a wedge device reciprocated by said lever to bring the clutches into action; and means operable by the lever for locking the wedge in operative position. i.

2. In combination with a frame, a shaft l and bearings for said shaft, said shaft being mounted for rotary and longitudinal movement in said bearings; means adapted to reverse the longitudinal movement of said shaft; said means comprising a feed screw; a countershaft connected to rotate said feed screw; a trip rod; a sleeve slidable on said rod; a level pivotally connected intermediate its ends to said frame and having one end attached to said sleeve; means adapted to drive the countershaft in opposite directions and comprising clutch members rotating in opposite directions; and means operable by said trip rod and lever to alternately bring said clutch members into action to rotate the countershaft and feed screw.

3. In combination with a frame, a shaft and bearings for said shaft, said shaft being `mounted for rotary and longitudinal movement in said bearings means adapted to reverse the longitudinal movement of said shaft and comprising a feed screw; a countershaft connected to rotate said feed screw;

means adapted to drive the countershaft in opposite directions and comprising clutch members rotating in opposite directions; a tri rod; a lever operable by said trip rod an means operable by said trip rod and lever to alternately bring one of said clutch members into action to drive the countershaft and feed screw.

e, in combinati@ with a mounted.

/inovement of said shaft independently of its rotary movementand .comprising stops circling said shaft and being-loosely mounted' thereon; a.countershaft connected toro- .tate saidy feed screw to bring vsaid screw into engagement with said stops; means adapted to drive the countershaft in opposite directions and comprising clutch members rotating in opposite directions; a trip rod operated by said feed screw; a lever operated by said trip rod and being adapted to alternately bring said clutch members into action; and means adapted to secure said lever in alternating positions to alternately hold said clutch members in engagement until the shaft has been moved a predetermined distance.

5. In combination with a shaft mounted for rotary and longitudinal movement; means adapted to reverse the longitudinal movement of said shaft and comprising a feed screw; a countershaft connected to rotate the feed screw and having clutch members adapted to be alternately brought into action to rotate said countershaft and operate said feed screw; means adapted to rotate said clutch members in opposite directions; a lever adapted to alternately bring said clutch members into action; a trip .rod operated by said feed screw and adapted to operate said lever; and latch means to hold said lever ina clutch operating position until the shaft has been moved a predetermined distance.

6. In combination with a shaft mounted for rotary and longitudinal movement; means adapted to reverse the longitudinal movement of said shaft and comprising a feed screw; a countershaft connected to operate said feed screw and having clutch members adapted to be alternately brought into action to rotate said countershaft and operate saidfeed screw; means adaptedto rotate said clutch members in opposite directions; a lever adapted to alternately bring said clutch members into action; a trip rod adapted to operate said lever; and means operated by said trip rod to hold said lever in operating position until the shaft has been moved a predetermined distance. y

7. In combination, a drive shaft; a member mounted for rotary and endwise movement; means adapted to reverse the longitudinal movement of said member; said means comprising a counter shaft connected to rotate said member; clutch members on said counter shaft driven in opposite directions by said drive shaft; means to bring one of said clutch members into action to rotate said counter shaft; a trip rod operable by said member; a lever operable by said secured to said shaft and a feed screw en- 7 trip rod; fandfmeansp adapted tof-*held said has-been, moved-al predetermined distance leverna loluteh-operatingepositionvcomprisin oneK direction. Y 10 'ing keepers-.5 IlatchesY pivobally donnectedto In testimony `whereof,lhavelfieleunto set .said leverv and'adapted to Yengage s aidikeep.- InyhandratfLOs AngelemCaliQrnia, this 8th 5 ers alterntely; Ineansito;normallyholdfsaid 'day of Ap'1i151922;

latches tbwardjthe ,keepei'fsg 'and itri'p f means GEORGE 'CUSH'XNGWMARTIN earred'rby `said tript rod 'to disconnect S'ad VVtneSS-z V'latches `imm :the keepers when ysaid ,nember .Jamais-R.` TOWNSEND. 

